Carrier Error Code 23.2: Secondary pressure switch stuck closed (Furnace)
Carrier error code 23.2 on a furnace means: Secondary pressure switch stuck closed. It is also called Carrier diagnostic code 23.2.
Homeowner? What Carrier code 23.2 means for you
Check, then call Your furnace is reporting: Secondary pressure switch stuck closed. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
- Make sure the furnace front door or panel is closed properly; many furnaces will not run with the door switch open.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
- Check that the gas valve next to the furnace is open (handle in line with the pipe). Do not force it.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Carrier error code 23.2 mean?
The secondary (inducer housing) pressure switch (HPS) is closed when it should be open. The control checks both switches are open before starting the inducer.
Applies to: Carrier 59SC6A
Common causes of Carrier code 23.2
- Stuck switch contacts
- Jumpered or miswired switch
- Pressure tube problem
Carrier models that use code 23.2
59SC6A026M14--1059SC6A040M14--1059SC6A040M17--1259SC6A060M14--1259SC6A060M17--1659SC6A080M17--1659SC6A080M21--2059SC6A100M21--2059SC6A100M21--2259SC6A120M24--2259SC6A140M24--22
Other Carrier Furnace codes
All Carrier Furnace error codes →
Carrier code 23.2: homeowner questions
What does Carrier code 23.2 mean?
Secondary pressure switch stuck closed. The secondary (inducer housing) pressure switch (HPS) is closed when it should be open. The control checks both switches are open before starting the inducer.
Is it safe to keep using my furnace with code 23.2?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset Carrier code 23.2 myself?
You can try one reset (power off for 30 seconds, then on). If Carrier code 23.2 comes back, the cause is still there and a licensed technician should check it.
Who can fix Carrier code 23.2 near me?
Aurora Star Tech Inc. repairs Carrier furnaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean
Troubleshooting guides
- Blowing cold air All brands · Furnace
- No heat All brands · Furnace
- Short cycling All brands · Furnace
- Burners will not light or stay lit - Carrier 58SB0A/58SB1A Carrier · Furnace
- Furnace not responding to thermostat - Carrier 58SB0A/58SB1A Carrier · Furnace
Source: Carrier 59SC6A Installation, Start-up, Operating and Service Instructions, Fig. 60 Service Label p.54; Fig. 61 Wiring p.56; Sequence of Operation p.68. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.